Direct Variation

Presentation

•

Mathematics

•

7th - 8th Grade

•

Practice Problem

•

Hard

•

CCSS

6.EE.C.9

Standards-aligned

REBECCA COOK

Used 382+ times

FREE Resource

4 Slides • 6 Questions

Direct Variation

Another way of describing a relationship between X and Y that is proportional

In direct variation, one variable will always be a constant multiple of the other.

Constant of Proportionality:

Situations that vary directly can always be represented with the equation

y = K x ( K is your CoP)

K = y/x

To find K you must divide Y by X

Open Ended

If x = 9 and y = 6 then.... k = ______________

What would your equation be? y= _______________

If x = 2 and y =15 then... k = ____________

What would your equation be? y= ____________

Type response here

Fill in the Blanks

Type answer...

Fill in the Blanks

Type answer...

Fill in the Blanks

Type answer...

Now answer the following questions on your own.

Multiple Choice

If x = 10.5 and y = 21, what is the equation that represents the direct variation?

y = -2x

y = 2x

y = .5x

y = 1.5x

y = 2/3x

Multiple Choice

If x= 20/3 and y = 10, what is the equation that represents the direct variation?

y = -2x

y = 2x

y = .5x

y = 1.5x

y=2/3x

Direct Variation

Another way of describing a relationship between X and Y that is proportional

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